CN101868666A - Bleed type electromagnetic valve - Google Patents

Bleed type electromagnetic valve Download PDF

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Publication number
CN101868666A
CN101868666A CN200980101052A CN200980101052A CN101868666A CN 101868666 A CN101868666 A CN 101868666A CN 200980101052 A CN200980101052 A CN 200980101052A CN 200980101052 A CN200980101052 A CN 200980101052A CN 101868666 A CN101868666 A CN 101868666A
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CN
China
Prior art keywords
stream
switching part
stream switching
delivery outlet
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN200980101052A
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Chinese (zh)
Inventor
屉子俊平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aisin AW Co Ltd
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Aisin AW Co Ltd
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Filing date
Publication date
Application filed by Aisin AW Co Ltd filed Critical Aisin AW Co Ltd
Publication of CN101868666A publication Critical patent/CN101868666A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0603—Multiple-way valves
    • F16K31/061—Sliding valves
    • F16K31/0613—Sliding valves with cylindrical slides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0405—Valve members; Fluid interconnections therefor for seat valves, i.e. poppet valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
    • F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
    • F16H61/0251—Elements specially adapted for electric control units, e.g. valves for converting electrical signals to fluid signals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
    • F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
    • F16H61/0251—Elements specially adapted for electric control units, e.g. valves for converting electrical signals to fluid signals
    • F16H2061/0253—Details of electro hydraulic valves, e.g. lands, ports, spools or springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
    • F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
    • F16H61/0251—Elements specially adapted for electric control units, e.g. valves for converting electrical signals to fluid signals
    • F16H2061/0258—Proportional solenoid valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87217—Motor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87233—Biased exhaust valve
    • Y10T137/87241—Biased closed

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

An electromagnetic valve (20) is a bleed type electromagnetic valve, wherein formed are a flow path A in which the hydraulic oil flowing into a sleeve (42) via an input port (52) flows into a flow path changeover section (60) through a restrictor by means of a restriction opening (64), thereafter being output from an output port (54) along with the associated drainage from a drain port (56) and a flow path B in which the hydraulic oil flows between the outer circumferential face of the flow path changeover section (60) and the inner circumferential face of the sleeve (42) without passing through the restrictor to be output from the output port (54). The flow path A and the flow path B can be made open according to the output amount required to be output from the output port (54), or the flow path A can be only made open along with the associated drainage from the drain port (56) in a manner to move a valve shaft (70) and the flow path changeover section (60) by driving an electromagnetic section (30) for shutting off the flow path B.

Description

Bleed type electromagnetic valve
Technical field
The present invention relates to a kind of drainage (bleed) type solenoid valve.
Background technique
In the past, proposed so a kind of bleed type electromagnetic valve, it has: the chamber is pressed in output, and it is formed with delivery outlet, and this delivery outlet is communicated with supplying mouth via throttle orifice, and is connected with floss hole via the intercommunicating pore that forms in the axial direction; Ball valve body, it is from supplying with oral-lateral and connect with the outer rim of throttle orifice and can blocking supplying mouth and export being communicated with of pressure chamber; Bar portion, it can press the chamber side through throttle orifice and ball valve body butt from output; The escape valve body, it is fixed with bar portion; Electromagnetism portion, it utilizes the attraction force that coil electricity is produced to make the escape valve body move (for example with reference to patent documentation 1).In this solenoid valve, bar portion and ball valve body butt when non-energising and make throttle orifice open-minded, so that supplying mouth is communicated with delivery outlet, and the ball valve body connects with the outer rim of intercommunicating pore and blocks being communicated with of delivery outlet and floss hole; When energising, utilize the aperture corresponding, make throttle orifice and intercommunicating pore open-minded, thereby supplying mouth is connected with delivery outlet, and delivery outlet is connected with floss hole with the mobile position of escape valve body.
Patent documentation 1:JP spy opens the 2002-286152 communique.
Summary of the invention
In above-mentioned bleed type electromagnetic valve, the delivery volume of supplying with from supplying mouth is adjusted the discharge capacity that the self-discharging mouth is discharged relatively, with the output quantity of adjusting from delivery outlet output, thereby has the also big more problem of the big more then discharge capacity of output quantity.Therefore, when increasing output quantity, make pump, when improving delivery volume, increased discharge capacity and reduced running efficiency with high loaded process.Particularly to for example as main oil pressure the working oil of high pressure carry out pressure regulation and directly being supplied in the direct control of frictional engagement members such as clutch, break, the delivery volume of working oil is many, thereby not only further increased discharge capacity, running efficiency is worsened, and increased the burden on the pump, force like this pump is maximized.
Main purpose of the present invention is, suppresses can guarantee required output quantity in the discharge capacity in bleed type electromagnetic valve.
Bleed type electromagnetic valve of the present invention is characterised in that to have:
The valve body of hollow, it is formed with the inlet opening that is used for flowing into vertically for working fluid, is used for to the delivery outlet of side output services fluid and the exhaust port that is used for discharging to the side working fluid;
The stream switching part, it is inserted into the inside of described valve body, to form first stream and second stream, along with described second stream being switched between state and the opening state blocking along should be axial mobile, wherein, to be the working fluid that flows into through described inlet opening flow into the inside of this stream switching part and from described delivery outlet output through restriction to described first stream, and the stream that can discharge from described exhaust port; Described second stream is the stream that described working fluid is directly exported from described delivery outlet without described restriction;
Valve shaft, it is inserted into the inside of described stream switching part, along with moving and can between following three kinds of states, switch vertically with described stream switching part, these three kinds of states comprise: with described exhaust port sealing, the state that described working fluid is circulated in described first stream and described second stream; Block described second stream, and along with the adjusting of the open mode of described exhaust port, the state that described working fluid is circulated in described first stream; Seal described inlet opening, and the state that described delivery outlet is communicated with described exhaust port;
Electromagnetism portion, it moves described valve shaft vertically.
In this bleed type electromagnetic valve of the present invention, the valve body of hollow is formed with the inlet opening that is used for flowing into vertically for working fluid, is used for to the delivery outlet of side output services fluid and the exhaust port that is used for discharging to the side working fluid, the stream switching part that is inserted into the valve body inside of hollow forms first stream and second stream, wherein, to be the working fluid that flows into through the inlet opening flow into inner and from delivery outlet output through restriction first stream, and the stream of discharging from exhaust port; Second stream is the stream that working fluid is directly exported from delivery outlet without restriction.And, utilize this stream switching part and be inserted in the valve shaft of stream switching part inside, switch along with moving between following three kinds of states vertically, these three kinds of states comprise, the sealing exhaust port, the state that working fluid is circulated in first stream and second stream; Block second stream, and the state that working fluid is circulated along with the adjusting of exhaust port open mode in first stream; Sealing inlet opening, and the state that delivery outlet is communicated with exhaust port.Therefore, as required from the output quantity of delivery outlet output, the working fluid that flows into through the inlet opening is circulated in first stream and second stream and export from delivery outlet, perhaps can block second stream, the few working fluid of input quantity that flows into through restriction is circulated in first stream, follow the adjustment of the discharge capacity of discharging from exhaust port and export from delivery outlet.Its result can suppress discharge capacity in bleed type electromagnetic valve, can guarantee required output quantity simultaneously.
In such bleed type electromagnetic valve of the present invention, described stream switching part is for being formed with the hollow member of diameter less than the opening portion of the diameter of described inlet opening in the end, making this opening portion is the described restriction of described first stream, make between the inner peripheral surface of the outer circumferential face of described stream switching part and described valve body and be described second stream, along with described stream switching part moving and during with described valve body butt, block described second stream vertically with the bearing surface of described stream switching part and this valve body.So, can switch stream with easy formation.In the bleed type electromagnetic valve of the present invention of this mode of execution, also can constitute,
In described stream switching part, be equipped with and be used for the force application mechanism of described valve shaft to the described electromagnetism portion side application of force,
When described electromagnetism portion drove, described valve shaft utilized the loading force of described force application mechanism to remove butt with described stream switching part, makes described restriction open, and blocked being communicated with of described delivery outlet and described exhaust port;
When described electromagnetism portion drives, till described stream switching part and described valve body butt, it is constant that described valve shaft utilizes the loading force of described force application mechanism to keep the open state of described restriction, moves to the direction of gently blocking described second stream linkedly with this stream switching part
At described stream switching part and described valve body butt and after blocking described second stream, when the driving force of described electromagnetism portion is higher than the loading force of described force application mechanism, described valve shaft overcomes this loading force with under the situation of this stream switching part interlock not moving, and described delivery outlet is communicated with described exhaust port the closer to the stream that described restriction then becomes big more with described valve shaft;
When described valve shaft during, block this restriction with the bearing surface of described valve shaft and this stream switching part, and this delivery outlet is communicated with this exhaust port in the axial direction with described stream switching part butt.So, can carry out the switching of stream swimmingly.
In addition, in bleed type electromagnetic valve of the present invention, also can constitute, described valve body has the pressure chamber, this pressure chamber forms, flow into working fluid from the side, to offset the mode that acts on the part of the hydrodynamic pressure on the described stream switching part by working fluid, to effect of described stream switching part and the reverse hydrodynamic pressure of described hydrodynamic pressure through the input of described inlet opening.So, the hydrodynamic pressure that the working fluid through inlet opening input is acted on the stream switching part is suitable hydrodynamic pressure.
And then, in bleed type electromagnetic valve of the present invention, described bleed type electromagnetic valve can be through the input of described inlet opening by the principal pressure after the modulating valve pressure regulation, and, the principal pressure of being imported is carried out pressure regulation, with oil pressure through described delivery outlet directly export the supply of accepting oil pressure to and work be assembled in clutch or break in the automatic transmission.Carrying out the solenoid valve that pilot pressure after the pressure regulation inputs to the control valve that the principal pressure pressure regulation uses with the adjusting pressure that will be decompressed to certain pressure to principal pressure as input compares, because incoming pressure is high principal pressure, and increased the discharge capacity of discharging, thereby be suitable for of the present invention significant from exhaust port.
Description of drawings
Fig. 1 is the structural drawing of expression as the structure summary of the solenoid valve 20 of one embodiment of the invention.
Fig. 2 is the explanatory drawing that is illustrated in the state of pressure regulator valve portion 40 in solenoid valve 20 actions.
Fig. 3 is illustrated in solenoid valve 20 action from the input quantity of inlet opening 52 with from the explanatory drawing of the variation of the output quantity of delivery outlet 54.
Embodiment
Below, use embodiment to describe to being used to implement preferred forms of the present invention.
Fig. 1 is the structural drawing of expression as the summary of solenoid valve 20 structures of one embodiment of the invention.Embodiment's solenoid valve 20 constitutes the directly bleed type linear solenoid valve (linearsolenoid valve) of (direct) control usefulness, for example be used for frictional engagement members such as the clutch that is assembled in automatic transmission, break are carried out oil pressure control, based on go out from oil pump 12 force feeds and use linear electromagnetic element 14 by modulating valve 16 pressure regulation after oil pressure (main oil pressure), generate best clutch and press, and can directly control frictional engagement members such as clutch, breaks.This solenoid valve 20 constitutes the open type linear solenoid valve that inlet opening 52 is opened, and it has: electromagnetic element (solenoid) portion (electromagnetism portion) 30; Pressure regulator valve portion 40, this pressure regulator valve portion 40 utilize this electromagnetic element portion 30 to drive and import main oil pressure, and the main oil pressure of being imported is carried out exporting after the pressure regulation.
Electromagnetic element portion (electromagnetism portion) 30 has: housing 31, and it is the band cylinder element at the end; Coil (electromagnetic element coil) 32, it is configured in all sides in the housing 31, by insulated conductor being wound into last formation of bobbin (bobbin) 32a of insulating properties; First iron core 34, its be formed with flange outer periphery portion be fixed on housing 31 open ends lip part 34a and from lip part 34a along coil 32 inner peripheral surface to axially extended cylindrical part 34b; Second iron core 35 cylindraceous, it contacts with the recess inner peripheral surface that is formed on housing 31 bottoms, and along the inner peripheral surface of coil 32 to extending axially the position of opening predetermined distance with the cylindrical part 34b sky of first iron core 34; Plunger 36, it is inserted in second iron core 35, can be vertically slides on the inner peripheral surface of the inner peripheral surface of first iron core 34 and second iron core 35.The axial region 72 of valve shaft 70 is inserted among the cylindrical part 34b of first iron core 34 the front end butt with plunger 36, and can slide vertically at the inner peripheral surface of cylindrical part 34b.In addition, in electromagnetic element portion 30, be configured in the connector portion 39 of the peripheral part that is formed at housing 31, switch on to coil 32 through this terminal from the terminal of coil 32.
At the front end of the cylindrical part 34b of first iron core 34, outer surface has the more little tapered portion of forward end external diameter more, is formed with and can bears the 34c of portion greater than the plunger that the front end of the plunger 36 of axial region 72 external diameters inserts for external diameter at internal surface.Plunger bears the ring part 34d that the 34c of portion is provided with the ring-type that is formed by nonmagnetic substance so that plunger 36 not can with the first 34 direct butts unshakable in one's determination.
Housing 31, first iron core 34, second iron core 35 and plunger 36 form by strong magnetic materials such as highly purified iron, and function is brought into play as nonmagnetic material in the space between the end face of the end face of the cylindrical part 34b of first iron core 34 and second iron core 35.In addition, this space needs only and brings into play function as nonmagnetic material, thereby can be provided with nonmagnetic metal such as stainless steel steel, brass.
In electromagnetic element portion 30, when coil 32 is switched on, in the mode around the order wound coil 32 of pressing housing 31, second iron core 35, plunger 36, first iron core 34, housing 31, form magnetic circuit for the magnetic flux circulation, thus, the effect that produces attraction force between first iron core 34 and plunger 36 attracts plunger 36.As mentioned above, can connect to the front end of axial region 72 in axial sliding along the inner peripheral surface of first iron core 34 with plunger 36, thus utilize the attraction force that acts on the plunger 36 with valve shaft 70 forwards (left among the figure) release.
As shown in Figure 1, pressure regulator valve portion 40 has: roughly be hollow sleeve 42 cylindraceous, the one end is installed on the housing 31 and first iron core 34 of electromagnetic element portion 30; Stream switching part 60, its be inserted in sleeve 42 inner spaces roughly be hollow member cylindraceous, the inner space of sleeve 42 is separated, formation flows into working oil in the sleeve 42 at the stream of hollow unit internal circulation and the stream that circulates between the inner peripheral surface of the outer circumferential face of hollow unit and sleeve 42, and flow path is switched; Valve shaft 70, the front end of itself and plunger 36 connects, and is inserted in the stream switching part 60, carries out the switching of valve with stream switching part 60.
Sleeve 42 is equipped with end plate 46 in the end, the opening portion as sleeve 42 inner spaces is formed with: inlet opening 52, and it is formed on the end plate 46, and input vertically is adjusted to the working oil of main oil pressure; Delivery outlet 54, the substantial middle place that it is formed on sleeve 42 sides is used for to clutch CL side output services oil; Floss hole 56, the position on the right side that it is formed on sleeve 42 sides is used to discharge working oil; Pressure chamber 57, it flows into for the working oil that is adjusted to main oil pressure, and flow path switching part 60 is (left among the figure) reactive fluid pressure forwards; Tap hole 58, it is used to discharge along with moving of valve shaft 70 from the working oil of leaking out between the outer circumferential face of the inner peripheral surface of sleeve 42 and valve shaft 70.In this sleeve 42, form and roughly the same minor diameter part 55 of the external diameter of stream switching part 60 and the large-diameter portion 53 that forms with the diameter bigger by diameter than the diameter of this minor diameter part 55, form inwall with the level.
Stream switching part 60 be equipped with in the end and inlet opening 52 butts switching the switch boards 62 of stream, the opening portion as the inner space of stream switching part 60 is formed with: throttling opening 64, it is formed on the switch boards 62, is used for input service oil vertically; Output opening portion 66, it is towards delivery outlet 54 openings; Discharge with opening portion 68, it is towards exhaust port 56 openings; Interconnecting part 67, it will be exported with opening portion 66 and discharge with opening portion 68 and be communicated with, and be used to insert valve shaft 70.The diameter of throttling opening 64 forms the diameter less than inlet opening 52, and, on the position that throttling opening 64 is formed at when switch boards 62 connects with the outer rim of inlet opening 52 with inlet opening 52 is communicated with.In addition, the diameter of interconnecting part 67 forms the diameter greater than valve shaft 70, and the gap between interconnecting part 67 and the valve shaft 70 becomes stream, can be for the working oil circulation.The diameter of the minor diameter part 55 of the external diameter of this stream switching part 60 and sleeve 42 is roughly the same, thereby, stream switching part 60 can and the minor diameter part 55 of sleeve 42 between carry out slippage, and large-diameter portion 53 between form can be for the space of working oil circulation.Therefore, shown in the enlarged view among Fig. 1, under the state (hereinafter referred to as original state) that coil 32 is not energized, be formed with: stream A, 52 working oil that flow into flow into inside by 64 throttlings of throttling opening through the inlet opening, and through output with opening portion 66 from delivery outlet 54 output, and, can and discharge with opening portion 68 and discharge through interconnecting part 67 from exhaust port 56; Stream B under the situation of working oil without throttling, circulates between the inner peripheral surface of the large-diameter portion 53 of the outer circumferential face of stream switching part 60 and sleeve 42, and directly exports from delivery outlet 54.In addition, when with the axial mobile phase interlock of valve shaft 70, during the outer rim butt of switch boards 62 and inlet opening 52, blocking stream B, and 52 when separating, opening stream B from the inlet opening when switch boards 62 with its bearing surface.The axial hydrodynamic pressure that acts on this stream switching part 60 has: by forwards (left among the figure) and rear (among the figure right-hand) hydrodynamic pressure of effect and the hydrodynamic pressure that is forwards acted on by the working oil in the feed pressure chamber 57 of 52 working oil that flow into through the inlet opening.At this, because 52 working oil and the working oil in the feed pressure chamber 57 that flow into all become same pressure for main oil pressure through the inlet opening, forwards the application of force area of Zuo Yong hydrodynamic pressure is less than the application of force area of the hydrodynamic pressure that rearward acts on, so rearward Zuo Yong hydrodynamic pressure is bigger, utilize this differential pressure, under original state, push stream switching part 60 to rear.But rearward the hydrodynamic pressure that always forwards acted on of Zuo Yong hydrodynamic pressure is offset a part, therefore, by forming pressure chamber 57, can reduce to make stream switching part 60 forwards to move required thrust, thereby make 30 miniaturizations of electromagnetic element portion.
In stream switching part 60, spring (force application mechanism) 76 is installed, this spring 76 bears portion with switch boards 62 as spring (force application mechanism) and to valve shaft 70 (among the figure right-hand) application of force rearward.Set the loading force size of this spring 76, make that this spring 76 can be with valve shaft 70 pushings rearward under original state, and, when coil 32 is energized, can stretch according to the counteractive size from switch boards 62, wherein this switch boards 62 accepts to act on attraction force on the plunger 36 via valve shaft 70 and spring 76.Promptly, the loading force of spring 76 is set at, even valve shaft 70 moves, till the outer rim butt of switch boards 62 and inlet opening 52, spring 76 takes place flexible hardly, and behind the outer rim butt of switch boards 62 and inlet opening 52, spring 76 according to from the reaction of switch boards 62, be that the size of attraction force is stretched.Therefore, before the outer rim butt of switch boards 62 and inlet opening 52, keep valve shaft 70 rearward pushings, can make stream switching part 60 and valve shaft 70 interlocks, after the outer rim butt of switch boards 62 and inlet opening 52, can regulate the relative position of valve shaft 70 relative stream switching parts 60 according to the size of attraction force.
Valve shaft 70 forms the axis-shaped component of the inner space that is inserted in stream switching part 60, has: axial region 72, and itself and plunger 36 butts, and the section diameter that inserts in the interconnecting part 67 is smaller; Flow adjustment part 74; It is used to adjust the flow of the working oil that flows out the inner space that flows into stream switching part 60.Flow adjustment part 74 has: columnar portion 74a, and its external diameter forms the diameter greater than throttling opening 64, with switch boards 62 butts the time, blocks throttling opening 64 with its bearing surface; Lip part 74b, its external diameter forms the external diameter greater than columnar portion 74a, ammunition feed spring 76 butts; Tapered portion 74c, its external diameter is less than the external diameter of lip part 74b, and forms more to the more little cone-shaped of axial region 72 external diameters, when itself and interconnecting part 67 outer rims connect, block the stream in the gap between interconnecting part 67 and the valve shaft 70, thereby blocked the circulation of working oil to floss hole 56.
Below, according to Fig. 2 the action of the embodiment's of such formation solenoid valve 20 is described.Fig. 2 is the explanatory drawing that is illustrated in the state of pressure regulator valve portion 40 in solenoid valve 20 actions.At first, consider the situation of original state.In this case, as mentioned above, stream switching part 60 and valve shaft 70 are pushed to the rear, thereby shown in Fig. 2 (a), stream A and stream B are open-minded, and interconnecting part 67 is blocked.Therefore, can be with 52 working oil that flow into all export delivery outlet 54 to through the inlet opening.Then, consideration begins the situation to coil 32 energisings.In this case, valve shaft 70 forwards moves, but as mentioned above, spring 76 takes place flexible hardly, and stream switching part 60 moves linkedly with valve shaft 70.Therefore, kept the state that blocks with interconnecting part 67 opened of stream A, but stream B has gently been blocked along with described moving.When the outer rim butt of switch boards 62 and inlet opening 52, block stream B with its bearing surface, spring 76 takes place flexible, and valve shaft 70 is just in time stopped on the position of balance in loading force and attraction force.The state of this moment is shown in Fig. 2 (b).As shown in the figure, be in following state: stream B is blocked, and inlet opening 52 is communicated with throttling opening 64, and interconnecting part 67 is open-minded, and delivery outlet 54 exhaust ports 56 are communicated with.Therefore, the working oil few through the input quantity of throttling opening 64 throttlings flows into, and, by loading force and attraction equilibrium of forces, valve shaft 70 moves to the place ahead to be increased the discharge capacity of working oil self-discharging mouth 56 more and reduces output quantity from delivery outlet 54, and valve shaft 70 moves to the rear to be reduced the discharge capacity of working oil self-discharging mouth 56 more and increase output quantity from delivery outlet 54.Like this, when discharging, block stream B and reduce the input quantity of working oil, therefore, can reduce discharge capacity with working oil self-discharging mouth 56.When attraction force during fully greater than loading force, shown in Fig. 2 (c), valve shaft 70 and switch boards 62 butts block throttling opening 64 with its bearing surface, and delivery outlet 54 are communicated with floss hole 55.Thus, the oil pressure that acts on clutch CL is descended.In addition, when stopping under the state of Fig. 2 (c) to 30 energisings of electromagnetic element portion, loading force by spring 76 rearward pushes valve shaft 70 and makes valve shaft 70 and switch boards 62 to separate, and utilizes the hydrodynamic pressure by the working oil generation that flows into once more to make valve shaft 70 and stream switching part 60 turn back to initial position.
Then, according to Fig. 3 to describing from the input quantity of inlet opening 52 and from the variation of the output quantity of delivery outlet 54 in 20 actions of above-mentioned solenoid valve.The variation of output input quantity in Fig. 3 (a) expression present embodiment, the variation of output input quantity in Fig. 3 (b) expression comparative example.This comparative example is different with present embodiment, is not provided with the flow switching part, with working oil during from the discharge of floss hole also not to the input quantity throttling, when valve shaft moves, the flow that changes with adjustment from delivery outlet output from the discharge capacity of floss hole.In the (a) and (b) of Fig. 3, transverse axis is represented the path increment L of valve shaft 70, and the longitudinal axis is represented input quantity fin, output quantity fout.Path increment L is defined as, and the value under original state is 0, is maximum value Lmax when the position of sealing inlet opening 52.At first, in the present embodiment, shown in Fig. 3 (a), when path increment L value was 0, the value of input quantity fin was f0, and the value of output quantity fu is f0, when path increment L gently increased, stream B was gently blocked, and along with the minimizing of input quantity fin output quantity fout was reduced.After the outer rim butt (path increment L1) of stream switching part 60 and inlet opening 52, stream B is blocked, and working oil only circulates in stream A, and following the flow of adjusting from the discharge of exhaust port 56 is output quantity fout.At this, for example, when the value of output quantity fout was fa, then as shown in the figure, having discharged discharge capacity from exhaust port 56 was the working oil of d1.In addition, when path increment L was maximum value Lmax, then the value of input quantity fin and output quantity fout all was 0.On the other hand, in comparative example,, with respect to input quantity fin, follow from the discharge of exhaust port and the flow of adjusting is output quantity fout, thereby the changes in flow rate shown in Fig. 3 (b) has taken place when valve shaft 70 begins when mobile.As can be known, if when the value of output quantity fout is fa, then as shown in the figure, discharging discharge capacity is the working oil of d2 in this comparative example, and discharge capacity d2 is greater than discharge capacity d1.Like this, in the present embodiment, compare, can reduce the discharge capacity when exporting along with the adjustment of discharge capacity with the situation of not switching stream.
Solenoid valve 20 according to aforesaid embodiment, the stream switching part 60 that utilization is inserted in the sleeve 42 forms following stream A and stream B, promptly, this stream A is that 52 working oil that flow into flow into inside by 64 throttlings of throttling opening through the inlet opening, follows from the discharge of floss hole 56 and from the stream of delivery outlet 54 outputs; This stream B is that the working oil that flows into through inlet opening 52 circulates between the inner peripheral surface of the outer circumferential face of stream switching part 60 and sleeve 42 without throttling, and the stream of directly exporting from delivery outlet 54; Utilize stream switching part 60 and valve shaft 70,, that is, block floss hole 56, the state that working oil is circulated in stream A and stream B according to should between following three kinds of states, switching from the flow of delivery outlet 54 output; Block stream B, and follow the adjusting of floss hole 56 open modes and state that working oil is circulated in stream A; Block throttling opening 64 and sealing inlet opening 52, and the state that delivery outlet 54 is connected with floss hole 56.Its result can guarantee required output quantity when suppressing discharge capacity.
Solenoid valve 20 among the embodiment constitutes 52 quilts open normal open molded lines solenoid valve in inlet opening under the original state, but also can constitute the normal close type linear solenoid valve that inlet opening 52 is closed under the original state.
Solenoid valve 20 among the embodiment is used for the oil pressure control to the clutch CL that is assembled in automatic transmission, but also can be used for the oil pressure control based on any operation mechanism of oil pressure work, can also be applied on the solenoid valve of non-direct control usefulness.
More than, use embodiment to be illustrated, but the present invention is not subjected to any qualification of such embodiment, without departing from the spirit and scope of the present invention, ought to implement in various modes to being used to implement preferred forms of the present invention.
Utilizability on the industry
The present invention can be applicable on the manufacturing industry of magnetic valve and automobile industry etc.

Claims (5)

1. bleed type electromagnetic valve is characterized in that having:
The valve body of hollow, it is formed with the inlet opening that is used for flowing into vertically working fluid, is used for to the delivery outlet of side output services fluid and the exhaust port that is used for discharging to the side working fluid;
The stream switching part, it is inserted into the inside of described valve body, to form first stream and second stream, along with described second stream being switched between state and the opening state blocking along should be axial mobile, wherein, to be the working fluid that flows into through described inlet opening flow into the inside of this stream switching part and from described delivery outlet output through restriction to described first stream, and the stream that can discharge from described exhaust port; Described second stream is the stream that described working fluid is directly exported from described delivery outlet without described restriction;
Valve shaft, it is inserted into the inside of described stream switching part, along with moving and can between following three kinds of states, switch vertically with described stream switching part, these three kinds of states comprise: with described exhaust port sealing, the state that described working fluid is circulated in described first stream and described second stream; Block described second stream, and along with the adjusting of the open mode of described exhaust port, the state that described working fluid is circulated in described first stream; Seal described inlet opening, and the state that described delivery outlet is communicated with described exhaust port;
Electromagnetism portion, it moves described valve shaft vertically.
2. bleed type electromagnetic valve according to claim 1 is characterized in that,
Described stream switching part is for being formed with the hollow member of diameter less than the opening portion of the diameter of described inlet opening in the end, making this opening portion is the described restriction of described first stream, make between the inner peripheral surface of the outer circumferential face of described stream switching part and described valve body and be described second stream, along with described stream switching part moving and during with described valve body butt, block described second stream vertically with the bearing surface of described stream switching part and this valve body.
3. bleed type electromagnetic valve according to claim 2 is characterized in that,
In described stream switching part, be equipped with and be used for the force application mechanism of described valve shaft to the described electromagnetism portion side application of force,
When described electromagnetism portion drove, described valve shaft utilized the loading force of described force application mechanism to remove butt with described stream switching part, makes described restriction open, and blocked being communicated with of described delivery outlet and described exhaust port;
When described electromagnetism portion drives, till described stream switching part and described valve body butt, it is constant that described valve shaft utilizes the loading force of described force application mechanism to keep the open state of described restriction, moves to the direction of gently blocking described second stream linkedly with this stream switching part
At described stream switching part and described valve body butt and after blocking described second stream, when the driving force of described electromagnetism portion is higher than the loading force of described force application mechanism, described valve shaft overcomes this loading force with under the situation of this stream switching part interlock not moving, and described delivery outlet is communicated with described exhaust port the closer to the stream that described restriction then becomes big more with described valve shaft;
When described valve shaft during, block this restriction with the bearing surface of described valve shaft and this stream switching part, and this delivery outlet is communicated with this exhaust port in the axial direction with described stream switching part butt.
4. according to each described bleed type electromagnetic valve in the claim 1 to 3, it is characterized in that,
Described valve body has the pressure chamber, this pressure chamber forms, flow into working fluid from the side, to offset the mode that is acted on the part of the hydrodynamic pressure on the described stream switching part by the working fluid through the input of described inlet opening, effect has the hydrodynamic pressure reverse with described hydrodynamic pressure to described stream switching part.
5. according to each described bleed type electromagnetic valve in the claim 1 to 4, it is characterized in that,
Described bleed type electromagnetic valve can be through the input of described inlet opening by the principal pressure after the modulating valve pressure regulation, and, the principal pressure of being imported is carried out pressure regulation, with oil pressure through described delivery outlet directly export the supply of accepting oil pressure to and work be assembled in clutch or break in the automatic transmission.
CN200980101052A 2008-03-28 2009-03-24 Bleed type electromagnetic valve Pending CN101868666A (en)

Applications Claiming Priority (3)

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JP2008-086687 2008-03-28
JP2008086687A JP4930428B2 (en) 2008-03-28 2008-03-28 Bleed solenoid valve
PCT/JP2009/055860 WO2009119609A1 (en) 2008-03-28 2009-03-24 Bleed type electromagnetic valve

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CN (1) CN101868666A (en)
DE (1) DE112009000033T5 (en)
WO (1) WO2009119609A1 (en)

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CN110220002A (en) * 2019-06-19 2019-09-10 宁波兴茂电子科技有限公司 A kind of energy-saving electromagnetic valve
CN110220002B (en) * 2019-06-19 2024-06-11 宁波兴茂电子科技有限公司 Energy-saving electromagnetic valve

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DE112009000033T5 (en) 2010-09-02
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JP4930428B2 (en) 2012-05-16
WO2009119609A1 (en) 2009-10-01
US8100142B2 (en) 2012-01-24

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